two CVS checkout differ though -D is same

[Cem Kayali <cemkayali%eticaret.com.tr@localhost>]

Hello!

I completed 2 times CVS checkout using -D'sameday'-UTC parameter, and 
one of them was about a month ago and one of them was yesterday. Some of 
files (except CVS/* ones) differ:

diff -r -q -x CVS src src-new > src.diff.txt
-------------------------------------------------------
Files src/usr.bin/vi/docs/features and src-new/usr.bin/vi/docs/features 
differ
Files src/usr.bin/vi/docs/internals/autowrite and 
src-new/usr.bin/vi/docs/internals/autowrite differ
Files src/usr.bin/vi/docs/internals/context and 
src-new/usr.bin/vi/docs/internals/context differ
Files src/usr.bin/vi/docs/internals/gdb.script and 
src-new/usr.bin/vi/docs/internals/gdb.script differ
Files src/usr.bin/vi/docs/internals/input and 
src-new/usr.bin/vi/docs/internals/input differ
Files src/usr.bin/vi/docs/internals/quoting and 
src-new/usr.bin/vi/docs/internals/quoting differ
Files src/usr.bin/vi/docs/internals/structures and 
src-new/usr.bin/vi/docs/internals/structures differ


Well, all of them are under /src/usr.bin/vi/docs folder (no important 
files) but i just expected no difference...

Regards,
Cem